From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Costa Shulyupin <costa.shul@redhat.com>
Cc: John Kacur <jkacur@redhat.com>,
"Luis Claudio R. Goncalves" <lgoncalv@redhat.com>,
Bart Wensley <bartwensley@gmail.com>,
Crystal Wood <crwood@redhat.com>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: [PATCH v2] rt-tests: hwlatdetect: Restore tracing parameters
Date: Wed, 21 Oct 2026 08:48:44 +0200 [thread overview]
Message-ID: <20261021064844.SBwm7htb@linutronix.de> (raw)
In-Reply-To: <CADDUTFyDT4Bx_MEpF9tCZfm9ECP33WatpfBjQ=2WH0dpRrXodA@mail.gmail.com>
On 2026-10-20 20:39:27 [+0300], Costa Shulyupin wrote:
> On Tue, 20 Oct 2026 at 13:16, Sebastian Andrzej Siewior
> <bigeasy@linutronix.de> wrote:
> > Could you please get rid of the DebugFS class in it?
> > The tracing folder should be auto-mounted at /sys/kernel/tracing by the
> > distribution. Currently it is also auto mounted at
> > /sys/kernel/debug/tracing if something is accessing this folder and this
> > is subject to vanish. Mounting it does not help then either.
>
> In the OpenShift/Kubernetes containers tracefs by default is at
> /host/sys/kernel/tracing and /host/sys/kernel/debug/tracing.
> Therefore, only the DebugFS mount and umount are redundant.
Interesting.
But how does this even work without extra glue around it? Is this the
global tracefs or per-namespace tracefs?
Does this still work with CONFIG_TRACEFS_AUTOMOUNT_DEPRECATED=n ?
Be aware that this is the only tool in rt-tests that still uses the
debugfs path.
> Costa
Sebastian
next prev parent reply other threads:[~2026-10-21 6:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 10:29 [PATCH v2] rt-tests: hwlatdetect: Restore tracing parameters Costa Shulyupin
2026-10-19 22:19 ` Crystal Wood
2026-10-20 10:16 ` Sebastian Andrzej Siewior
2026-10-20 17:39 ` Costa Shulyupin
2026-10-21 6:48 ` Sebastian Andrzej Siewior [this message]
2026-10-21 7:10 ` Sebastian Andrzej Siewior
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